CN104722562B - The control technique of aerobe reactor landfill yard - Google Patents

The control technique of aerobe reactor landfill yard Download PDF

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Publication number
CN104722562B
CN104722562B CN201510111362.2A CN201510111362A CN104722562B CN 104722562 B CN104722562 B CN 104722562B CN 201510111362 A CN201510111362 A CN 201510111362A CN 104722562 B CN104722562 B CN 104722562B
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landfill
time
aeration
waste
yard
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CN104722562A (en
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邱忠平
刘洋
刘源月
唐建
冯猛
华建军
廖禧
付春霞
刘志刚
柯佳闻
王强
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Southwest Jiaotong University
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Abstract

The invention discloses the control technique of a kind of aerobe reactor landfill yard, use Zoning landfill and landfill waste is carried out aeration and leachate recirculation operation affect growth metabolism and the enzymatic reaction of microorganism in field, quickening urban life landfill waste biodegradation and sedimentation.Aeration and leachate recirculation operation control: leachate recirculation amount is calculated as 15%~30% with volume fraction;Recycling frequency is 2~3d/ time, and aeration frequencies is 1:1~1:2;Under early stage landfill waste is in basicly stable state, carries out follow-up landfill, can effectively accelerate the stabilisation process of landfill yard.Present invention process can substantially speed up the stabilisation process of landfill yard and the biodegradation reducing pollutional load and can effectively accelerating landfill waste, accelerates the stabilisation process of refuse landfill.

Description

The control technique of aerobe reactor landfill yard
Technical field
The present invention relates to municipal solid wastes disposal technology, especially aerobe reactor landfill yard is the most steady Determine and pollution control technology field.
Background technology
Tradition garbage sanitary filling field component of refuse complexity, stabilisation required time length, percolate processing cost The defects such as high, landfill yard operating cost is high, therefore tradition landfill yard has waste reduction and dissolves inadequate, closes After safeguard that the supervision phase is long, risk is big, and landfill yard by drawbacks such as difficulties, significantly reduces sanitary landfills and disposes again The competitiveness of technology.For solving the problems that conventional sanitation landfill exists, twentieth century later stage America and Europe and day Country such as this grade takes the lead in having carried out the research of " biological respinse type " Landfill.Bioreactor landfill technology The stabilisation of landfill yard can be accelerated, although and anaerobism and semi-aerobic bioreactor Landfill are to a certain degree On accelerate the biodegradation of landfill waste, but the most inevitably inhibit the activity of aerobic microbiological, Organic waste degradation speed is slow and degraded is incomplete, and stabilisation required time is long, CH during landfill4Isothermal The generation of room gas exacerbates greenhouse effect, causes the further deterioration of global climatic environment.
Aerobe reactor Landfill is a kind of safe and efficient rubbish final disposal technology, and this technology is led to Cross the governing factors such as aeration and leachate recirculation, the oxygen sufficient for landfill yard offer and water supply, therefore, In landfill yard, aerobic microbiological population structure and activity are good, and growth metabolism is vigorous, can give full play to it to having The degradation function of machine thing, therefore Organic substance complete decomposition, landfill yard is stably quick, is to have in garbage loading embeading technology Machine garbage degradation the most thoroughly, the most quick Landfill.
The aeration frequencies of landfill waste and leachate recirculation frequency can directly affect the growth generation of microorganism in field Thank and enzymatic reaction speed, affect the dissolubility of compound in field, and then affect the character of landfill percolate With yield, affect biodegradation and the sedimentation of landfill waste, therefore, aeration frequencies and leachate recirculation frequency It it is the key factor affecting aerobe reactor Landfill Stabilization Rate process.Control suitable aeration frequencies and Leachate recirculation frequency, for improving the activity of microorganism and rubbish enzyme in landfill yard, accelerating landfill waste Biodegradation, the stabilisation process tool of quickening landfill yard are of great significance.
Research for garbage loading embeading technology the most both at home and abroad lays particular emphasis on anaerobism and semi-aerobic rubbish Landfill, Relevant control process control parameter about aerobe reactor landfill yard fast and stable is also rarely reported, because of This, the further exploration to Solid Waste Treatment technology of the research aerobe reactor landfill critical technical parameter Highly important strategic importance is had with technological reserve.
Summary of the invention
In view of the above deficiency of prior art, the present invention is based on this novel garbage loading embeading of aerobic landfill Technology, it is provided that the key technology of a kind of aerobe reactor landfill yard fast and stable, for aerobic biological respinse The fast and stable of device landfill yard and Environmental capacity provide important technical support.
The present invention solves its technical problem, be the technical scheme is that
The control technique of aerobe reactor landfill yard: landfill waste is carried out aeration and leachate recirculation Operation affect growth metabolism and the enzymatic reaction of microorganism in field, quickening urban life landfill waste biodegradation With sedimentation, it is characterised in that leachate recirculation amount is calculated as 15%~30% volume fraction with volume fraction;Return Filling frequency is 2~3d/ time, and aeration frequencies (aeration time: intermittent time) is 1:1~1:2;Use Zoning landfill Mode carry out garbage loading embeading, under landfill waste is in basicly stable state, carry out follow-up landfill.
Optimal processing parameter of the present invention is: controlling leachate recirculation amount is 20%, and recycling frequency is 2d/ time; Aeration frequencies is 1:2, aeration time: the intermittent time is 0.5h:1h;The compacted density of rubbish body is 550kg/m3, The biodegradation of landfill waste can be accelerated, reduce the pollutional load of landfill yard, accelerate aerobe reactor and fill out Bury the stabilisation process of field.When temperature is relatively low, recharge percolate to 40~50 DEG C by heating, be conducive to The stabilisation process of landfill yard.
Use the technological means of the present invention, aerobe reactor landfill yard fast and stable in the optimum amount of recharging and Under the conditions of recycling frequency, the amount of recharging, aeration frequencies, temperature, compacted density, and it is in base at landfill waste Carry out follow-up landfill under this steady statue, not only can reduce garbage filter output of fluid, reduce leachate contamination and bear Lotus and intractability, also can substantially speed up the biodegradation of organic waste in landfill yard, improves the sedimentation of rubbish Rate, accelerates the stabilisation process of landfill yard, saves operating cost.
The present invention is directed to landfill leachate treatment difficulty that refuse landfill faces, Solid Waste degraded slowly, The problems such as Landfill Stabilization Rate time length, by carrying out leachate recirculation, aeration, the compacting of control landfill waste Density and temperature control condition etc., promote growth of microorganism in landfill yard, accelerates the degraded of rubbish organic principle, Lowering leachate contamination load, save landfill yard operating cost, accelerate Landfill Stabilization Rate process, raising is filled out Bury a service life, reduce landfill yard construction cost, economize the land resource.
Accompanying drawing explanation
Accompanying drawing 1 amount of recharging affects figure to COD of waste leachate concentration
The changing trend diagram of pollutant under accompanying drawing 2 optimum condition
The changing trend diagram of follow-up loading embeading percolation liquid COD is carried out under the basicly stable state of accompanying drawing 3.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described:
Embodiment 1
The mode using artificial aeration carries out oxygen supply to rubbish body, carries out leachate reeirculation simultaneously.
The employing amount of recharging is 15%~30%, and in percolate, COD lowering of concentration is rapid, the most steady after 120d Fixed, ammonia nitrogen less than 25mg/L, reaches the discharge standard of national regulation, the sedimentation of rubbish body at about 80d Amount tends towards stability substantially at about 100d, and the biodegradation of rubbish is with conversion quickly;Leachate recirculation frequency Being 2~3d/ time, the most basicly stable after COD concentration 150d in percolate, ammonia nitrogen reaches state at about 75d The discharge standard of family's regulation;It is low that aeration frequencies is produced COD concentration in percolate by 1:1~1:2, and ammonia nitrogen exists About 70d reaches the discharge standard of national regulation, aeration time: when the intermittent time is 0.5h:1h, percolate The degradation rate of COD is the fastest, and rubbish settling amount is the highest.
Embodiment 2
Employing aeration frequencies is that 1:2 (aeration time: the intermittent time is 0.5h:1h) carries out oxygen supply to rubbish body, Controlling leachate recirculation amount is 20% (V/V), and recycling frequency is 2d/ time, and the compacted density of rubbish body is 550kg/m3。
Aerobe reactor landfill place is produced COD in percolate and is steeply risen at initial landfill stage, and in the 9d drastically declines after reaching peak value 38 000mg/L, drops to 10 below 000mg/L to about 53d, Until landfill end maintains 2 000mg/L after dropping to below 3000mg/L, 120d after 103d Left and right;Initial landfill stage, ammonia nitrogen Rapid Accumulation in percolate, reach peak value 798.1mg/ in 21d, thereafter Rapid decrease, less than country's household refuse landfill sites Environmental capacity standard (GB 16889-2008) after 53d Percolate ammonia nitrogen discharge standard 25mg/L of defined;PH value rises to more than 8.0 in 45d, until real Test end to maintain between 8.0~8.7 always;The accumulative settling amount of 0~45d landfill waste is linearly gone up Rising, settling amount reaches the 76.61% of whole settling amount when 45d, and about 90d tends towards stability.
Showing that controlling leachate recirculation amount is 20% (V/V), recycling frequency is 2d/ time, and aeration frequencies is 1:2, aeration time: the intermittent time is 0.5h:1h;The compacted density of rubbish body is 550kg/m3, most beneficial for The biodegradation of rubbish and conversion, with this understanding, the aerobic gas of Institute of Micro-biology is sufficient with moisture, landfill In, micro organism quantity is high with activity, and the stable degree of rubbish is high, and rubbish body sedimentation speed is fast, is conducive to Accelerate Landfill Stabilization Rate process.When temperature is relatively low, recharge percolate to 40~50 DEG C by heating, can Further speed up the stabilisation process of aerobe reactor landfill yard.
Embodiment 3
The method of operation of landfill yard is with embodiment 1.
The too high amount of recharging (entirely recharging) or the too low amount of recharging (rain making) and 5%~10% return Filling amount is all unfavorable for the biodegradation of rubbish, and during whole landfill, the relatively amount of recharging is 15%~30% The amount high 10.2%~15.5% of reactor produced reproducibility organic pollution, ammonia nitrogen qualified discharge 10d~35d in evening, Whole settling amount low 3.3%~13.3%, the amount of recharging is 15%~30% biodegradation that can effectively facilitate rubbish and turns Change.
Preferably recycling frequency is conducive to accelerating the biodegradation of landfill waste, and the pollution reducing percolate is born Lotus.Recycling frequency is produced reproducibility organic contamination by the reactor of 1d/ time, 5d/ time and 7d/ time relatively 2~3d/ time The amount high 3.2%~35.9% of thing, ammonia nitrogen qualified discharge 3d~19d in evening, whole settling amount low 2.1%~3.3%, oozes In filtrate, pollutional load is high, and stabilisation required time is long.
Aeration frequencies is 1:0.5,1:3 and the uninterrupted aeration reactor compared with 1:1~1:2 high 17.4%~22.7%, Ammonia nitrogen qualified discharge slow 8~15d, whole settling amount low 1.5%~3.1%;Aeration time: the intermittent time is 0.5h:1h Time, the degradation rate of percolate COD is the fastest, and at the end of experiment, COD concentration is 2200mg/L, relatively Other aerations interval than reactor produced percolate COD concentration low 15.3%~26.6%, the removal of ammonia nitrogen Effect is preferable, ammonia nitrogen qualified discharge during 67d, and garbage degradation speed is the fastest, and settling amount is the highest.
Embodiment 4
The method of operation of landfill yard is with embodiment 1.
Using the mode of Zoning landfill, follow-up landfill is basicly stable with completely stable rubbish at landfill waste respectively Carry out on rubbish body, basicly stable refer to fill place produce percolate pH value be 7~8, percolate yield is in The most stable, ammonia nitrogen and COD reduce from peak value, msw water content 55%~70%, rubbish body sedimentation amount Follow-up landfill is carried out to time the most steadily from rapid subsidence.
After the landfill waste basicly stable (reactor A) rubbish body with complete stability (reactor B) is carried out Continuous landfill, after follow-up landfill, the feature of reactor A and reactor B stable process is: filled for the first time The impact that waste steady degree is different, in reactor A, microbial activity is higher, and microorganism is to organic in rubbish The degradation speed of thing is very fast.During garbage degradation, msw water content first reduces to rise afterwards and reduces, reaction In device A, msw water content is higher than reactor B, and maximum difference is 8.86%;During 60d, reactor A and The TOC/TN ratio of B is down to 22.53 and 24.73 respectively, fat, protein, fiber in reactor A Element respectively low compared with reactor B by 25.0%, 13.3%, 10.6%, settling amount is high by 9.6%.The pH of reactor A Value takes the lead in being increased to more than 8.5, reaches the ammonia nitrogen discharge standard of national regulation in 60d, and relatively reactor B reaches Mark discharge about 30d in advance, in the produced percolate of initial landfill stage reactor A, COD is higher than reactor B, But the landfill later stage is low compared with the COD of reactor B, and after 100d, two reactor produced percolate COD become In stable, maintain about 2 000mg/L.

Claims (3)

1. the control technique of aerobe reactor landfill yard, carries out aeration and diafiltration to landfill waste Liquid recharges operation affects growth metabolism and the enzymatic reaction of microorganism in field, it is characterised in that Leachate recirculation amount is calculated as 15%~30% with volume fraction;Recycling frequency is 2~3d/ time, exposes The gas time: the intermittent time is 1:1~1:2;The mode using Zoning landfill carries out garbage loading embeading, Follow-up landfill is carried out under landfill waste is in basicly stable state;Described landfill waste is in base It is the most stable that this steady statue refers to that percolate yield is in, and now ammonia nitrogen and COD are from peak Value reduces, pH value 7~8, msw water content 55%~70%, and rubbish body sedimentation amount is from the most heavy It is down to the most steady.
The control technique of aerobe reactor landfill yard the most according to claim 1, it is special Levying and be, controlling leachate recirculation amount is 20%, recycling frequency 2d/ time;, aeration time: Intermittent time is 0.5h:1h;The compacted density of rubbish body is 550kg/m3.
The control technique of aerobe reactor landfill yard the most according to claim 1, it is special Levy and be, when temperature is relatively low, recharge percolate to 40~50 DEG C by heating.
CN201510111362.2A 2015-03-13 2015-03-13 The control technique of aerobe reactor landfill yard Active CN104722562B (en)

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JP2006130452A (en) * 2004-11-08 2006-05-25 Mhi Environment Engineering Co Ltd System and method for filtering incinerated ash-containing water
CN100491275C (en) * 2006-11-30 2009-05-27 湖南大学 Circulated backfilling and artificial wetland combined leachate processing method and its facility
CN100509664C (en) * 2007-04-28 2009-07-08 黄继国 Method for treating percolation liquid of water deficiency area garbage embedding field
CN101182250B (en) * 2007-11-07 2011-03-16 浙江大学 Domestic refuse resource treatment technology and apparatus therefor
CN101717169B (en) * 2009-12-07 2012-06-13 浙江大学 In-situ denitrification method of percolate of domestic refuse landfill
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